It's a hack with path strokes to make it appear as if being drawn, so yes it won't work with fills. Although if you approximate the fill with a zig-zagged strok

It's a hack with path strokes to make it appear as if being drawn, so yes it won't work with fills. Although if you approximate the fill with a zig-zagged stroke you could get a good impression of an animated, drawn fill as well with this.